decomposition of solid solution
Recently Published Documents


TOTAL DOCUMENTS

15
(FIVE YEARS 2)

H-INDEX

4
(FIVE YEARS 0)

2016 ◽  
Vol 61 (2) ◽  
pp. 1249-1254 ◽  
Author(s):  
M. Stopyra ◽  
D. Niemiec ◽  
G. Moskal

Abstract A2B2O7 oxides with pyrochlore or defected fluorite structure are among the most promising candidates for insulation layer material in thermal barrier coatings. The present paper presents the procedure of synthesis of holmium zirconate Ho2Zr2O7 and praseodymium zirconate Pr2Zr2O7 via Polymerized-Complex Method (PCM). Thermal analysis of precursor revealed that after calcination at relatively low temperature (700°C) fine-crystalline, single-phase material is obtained. Thermal diffusivity was measured in temperature range 25-200°C, Ho2Zr2O7 exhibits lower thermal diffusivity than Pr2Zr2O7. Additionally, PrHoZr2O7 was synthesized. The powder in as-calcined condition is single-phase, but during the sintering decomposition of solid solution took place and Ho-rich phase precipitated. This material exhibited the best insulating properties among the tested ones.


2016 ◽  
Vol 61 (1) ◽  
pp. 405-410
Author(s):  
M. Bigaj ◽  
S. Boczkal ◽  
J. Żelechowski ◽  
M. Gawlik ◽  
M. Mitka

The results of studies carried out on the heat treated AZ61 magnesium alloy extruded by two methods, i.e. direct extrusion and continuous rotary extrusion, were presented. As part of the work, parameters of the T6 heat treatment were proposed and aging curves were plotted. The solution heat treatment process was accompanied by the grain growth. During artificial aging, due to the decomposition of solid solution, the β-Mg17Al12 phase was precipitated from the supersaturated α solution. It precipitated in a coagulated form at the grain boundaries and in the form of fine-dispersed plates arranged in a preferred direction relative to the grain orientation. Rods obtained by continuous rotary extrusion, unlike those made by the direct process, exhibited a low degree of texturing and lack of anisotropic properties.


2011 ◽  
Vol 2 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Nguyen Q. Chinh ◽  
Tivadar Győri ◽  
Jenő Gubicza ◽  
János Lendvai ◽  
Terence G. Langdon

Abstract


2008 ◽  
Vol 137 ◽  
pp. 163-168
Author(s):  
S.G. Sheverev ◽  
G.V. Markova ◽  
V.V. Sumin

Spinodal decomposition of solid solution in the 60 at.% Mn - 40 at.% Cu alloy was observed at the temperatures of decomposition (380 – 420 °C) using the neutron diffraction method in situ. The contribution of residual stresses of third type introduced by further cooling of alloy and, correspondingly, martensitic tranformation is estimated. The relatively small value of stresses of third type introduced by martensitic transformation is revealed. Appearance of magnetic superstructural reflexes typical for antiferromagnetic ordered structure is noted.


2006 ◽  
Vol 519-521 ◽  
pp. 401-406 ◽  
Author(s):  
P.Yu. Bryantsev ◽  
V.S. Zolotorevskiy ◽  
V.K. Portnoy

Phase transformations in 6XXX alloys with Mn, Cu and Cr additions have been studied in the process of homogenization annealing at different temperatures. The continuous cooling transformation diagrams of decomposition of solid solution during the cooling of ingots from the homogenization temperature have been plotted. The effect of the cooling rate after homogenization on the properties of ingots during extrusion has been studied.


2001 ◽  
Vol 46 (5) ◽  
pp. 569-572 ◽  
Author(s):  
N. M. Vlasov ◽  
A. S. Gontar’ ◽  
V. A. Zaznoba

Sign in / Sign up

Export Citation Format

Share Document